mixer2

Buzz Comments is for users who’ve their WordPress blog in their Google Buzz connected sites list. 
In that case discussions about the Blogposts often split in two seperate threads. Some users reply on Buzz and some on the Blog. This plugin adds the comments posted on Buzz about your posts to the comments on the blog. The Buzz responses just get inserted between the normal comments in the correct chronological order. 
So the blog users can see the normal comments and the Buzz comments.
The plugin is beta and under heavy development. Please check from time to time for an update.
Note: It doesn’t work in combination with the WPML Multilingual plugin so far.
<a href="http://www.vertexten.de/2010/03/23/buzz-comments-demo-page/" title="Demonstration" rel="nofollow ugc">Try out a demonstration.</a>
Please read the <a href="http://code.google.com/p/wpbuzzcomments/wiki/Documentation" title="Documentation" rel="nofollow ugc">Documentation</a>.

Buzz Comments

Buzz Commments displays comments from your Google Buzz stream to your Wordpress posts, directly in the comment list on your blog.

Godlessons

Allows you to add full or partial posts to Google Buzz automatically. Allows one profile for the main feed and each author can add their own profile to their profile page.

WP AutoBuzz

Allows you to automatically add full posts to Google Buzz

Buzz Comments vs WP AutoBuzz